Bathtub



FIG. 1 is a perspective view of a bathtub showing our new design;

FIG. 2 is another perspective view thereof;

FIG. 3 is a front top thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a left side view thereof.

A right view is omitted since the right view is identical with the left view.

A rear view is omitted since the rear view is identical with the front view.

A bottom view is omitted since the bottom view is invisible in normal use.

The broken lines depict portions of the bathtub in which the design is embodied that form no part of the claimed design. 

CLAIM The ornamental design for a bathtub, as shown and described. 